/ Dictionary / Index T TCS: Meaning and Definition of Find definitions for: TCS Pronunciation: [key] traffic control station. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tcs (Thesaurus) TCP theorem TD Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language